Guard Your Heart by Dr. Betty R. Price teaches Christians how to protect their spiritual well-being. She explains that while Satan can't touch a believer's spirit directly, he can influence their thoughts, emotions, and decisions—what she calls the "soulish" part of the heart.

Using Proverbs 4:20–24, Dr. Betty shows that the heart shapes everything in life. To stay strong, believers should fill their hearts with God's Word. This helps fight off harmful feelings like jealousy, pride, and guilt.

She also offers biblical advice for dealing with tough issues like rejection, low self-esteem, money worries, and temptation. Her guidance includes praying, being generous, staying focused on God’s promises, and practicing self-control. By doing this, Christians can live with peace and victory.